Boza, R. A., Milanes, F., Hanna, S. G., Kaye, J., & al., et. (1989). Noncompliance in chronic depression: Assessment of serum antidepressant determination with the enzyme-immunoassay method. Annals of Clinical Psychiatry, 1(1), 43–49. Kluwer Academic Publishers, US, www.wkap.nl